You ll need two wires one white and one black for one circuit or more if you intend to wire a three way switch from the house or add more than one circuit.
Running wires without attic.
Watch the entire process step by step.
Attempting the job without preparation and taking the proper precautions can cost you time or money and can even be a serious safety hazard.
On a single story home or the the upper floor of a multiple story home this means accessing your attic to run wire.
If you re working from the attic you can drop a weighted string down wall cavity then attach the wire to the string and pull it through.
Totally hidden existing knob and tube wiring meets code and we have left it in place inside some interior walls.
Attach the wire or cable to a fish tape or coat hanger using electrical tape and feed it into the hole until it reaches the opening at the other end.
The actual install of recessed lights here https youtu be 5yc8aqnvqqg the long bit is actually used.
But if you have knob and tube running in an attic or exterior wall the space can not be insulated until the wiring is replaced.